摘要
通过sEMG的时域与频域分析评估在模拟驾驶过程中的驾驶员腰部疲劳。40个男性样本参加实验((29.7±3.1)岁),随机分成A((28.8±3.4)岁)、B((30.6±2.7)岁)两组,A组参加90min的模拟驾驶操作实验,B组保持自由坐姿。实验后分别计算分析实验样本的积分肌电值(IEMG)和功率谱中值频率(MF)。结果表明A组实验数据呈现良好的线性负相关(P<0.005和P<0.0001)。研究表明样本在实验结束后腰部肌肉疲劳加重。认为用sEMG信号的时频分析评估驾驶员肌肉疲劳状态是可行的。
The investigation was to evaluate drivers'lumbar fatigue via sEMG signals based on time- and frequency-domain analysis.Forty healthy males((29.7±3.1)years) were randomly divided into 2 groups,Group A ((28.8±3.4)years) and Group B((30.6±2.7)years).Subjects in Group A performed simulated driving task and Group B kept free sitting posture for 90min.IEMG and MF were calculated and analyzed after the task.The results indicated that data of IEMG and MF in Group A showed a significant negative correlation (P<0.005 andP<0.0001).Parameters and errors of linear regression equation of all indices were given finally.It is concluded that lumbar fatigue of drivers increased after simulated driving and it was feasible to evaluate drivers'lumbar fatigue via sEMG signals based on time- and frequency-domain analysis.
出处
《人类工效学》
2004年第3期10-12,19,共4页
Chinese Journal of Ergonomics
